<template>
	<div class="add">
		<!-- 面包屑导航 -->
		<el-breadcrumb separator=">">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->

		<el-card>
			<!-- 提示框 -->
			<el-alert title="添加商品信息" type="info" :closable="false" center show-icon></el-alert>
			<!-- 步骤条 -->
			<el-steps :active="activeIndex - 0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>

			<!-- tab栏区域 -->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
				<el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight"  type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number"  type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader
							    v-model="addForm.goods_cat"
									expand-trigger="hover"
							    :options="catelist"
							    :props="cateProps"
							    @change="handleChange"></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox :label="item1" v-for="(item1,index) in item.attr_vals" :key="index" border></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload
						  action="http://47.108.206.212:9999/api/private/v1/upload"
							:headers="headersObj"
						  :on-preview="handlePreview"
						  :on-remove="handleRemove"
						  list-type="picture" :on-success="handleSuccess">
						  <el-button size="small" type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<!-- 富文本编辑器组件 -->
						<quill-editor v-model="addForm.goods_introduce"></quill-editor>
							
						<el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>
		
		<!-- 图片预览对话框 -->
		<el-dialog
		  title="图片预览"
		  :visible.sync="previewVisible"
		  width="50%"
		  >
		  
			<img src="previewPath" alt="" class="previewIng" />
			
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'
	export default {
		data() {
			return {
				//完成进度
				activeIndex: '0',
				//添加商品的表单数据对象
				addForm: {
					goods_name: '',
					goods_price:0,
					goods_weight:0,
					goods_number:0,
					goods_cat:[],
					pics:[],
					goods_introduce:'',
					attrs:[]
				},
				//验证规则
				addFormRules: {
					goods_name:[
						{ required: true, message: '请输入商品名称', trigger: 'blur' }
					],
					goods_price:[
						{ required: true, message: '请输入商品价格', trigger: 'blur' }
					],
					goods_weight:[
						{ required: true, message: '请输入商品重量', trigger: 'blur' }
					],
					goods_number: [
						{ required: true, message: '请输入商品数量', trigger: 'blur' }
					],
					goods_cat:[
						{ required: true, message: '请输入商品分类', trigger: 'blur' }
					]
				},
				//商品分类列表
				catelist:[],
				cateProps:{
					label:'cat_name',
					value:'cat_id',
					children:'children'
				},
				//动态参数列表
				manyTableData:[],
				//静态属性列表
				onlyTableData:[],
				//图片上传组件的请求头
				headersObj: {
					Authorization: window.sessionStorage.getItem('token')
				},
				previewPath:'',
				previewVisible:false
						
			}
		},
		created() {
			this.getCateList()
		},
		methods: {
			async getCateList() {
				const {data:res} = await this.$http.get('categories')
				if(res.meta.status !== 200) {
					return this.$message.error('获取商品分类数据失败！')
				}else {
					this.catelist = res.data
				}
			},
			//级联选择器变化事件
			handleChange() {
				if(this.addForm.goods_cat.length !== 3) {
					this.addForm.goods_cat = []
				}
			},
			beforeTabLeave(activeName,oldActiveName) {
				if(activeName !== '0' && this.addForm.goods_cat.length !== 3) {
					this.$message.error('请先选择商品分类！')
					return false
				}
			},
			async tabClicked() {
				if(this.activeIndex === '1') {
					const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
					if(res.meta.status !== 200) {
						return this.$message.error('获取动态参数列表失败！')
					}else {
						res.data.forEach(item => {
							item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
						})
						this.manyTableData = res.data
						console.log(this.manyTableData)
					}
				}else if(this.activeIndex === '2') {
					const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
					if(res.meta.status !== 200) {
						return this.$message.error('获取静态属性列表失败！')
					}else {
						this.onlyTableData = res.data
					}
				}
				
				
			},
			//处理图片预览效果
			handlePreview(file) {
				this.previewPath = file.response.data.url
				this.previewVisible = true
			},
			//处理移除图片
			handleRemove(file) {
				const filePath = file.response.data.tmp_path
				
				const i = this.addForm.pics.findIndex(x => x.pic === filePath)
				
				this.addForm.pics.splice(i,1)
			},
			//监听图片上传成功事件
			handleSuccess(response) {
				console.log(response)
				const picInfo = {pic:response.data.tmp_path}
				this.addForm.pics.push(picInfo)
			},
			//添加商品
			 add() {
				this.$refs.addFormRef.validate(async valid => {
					if(!valid) {
						return this.$message.error('请填写必要的表单项！')
					}else {
						//深拷贝lodash cloneDeep(obj)
					 const form = _.cloneDeep(this.addForm)
						form.goods_cat = form.goods_cat.join(',')
						//处理动态参数
						this.manyTableData.forEach(item => {
							const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
							this.addForm.attrs.push(newInfo)
						})
						//处理静态属性
						this.onlyTableData.forEach(item => {
							const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
							this.addForm.attrs.push(newInfo)
						})
						form.attrs = this.addForm.attrs
						
						//申请网络请求，添加商品
						const {data:res} = await this.$http.post('goods',form)
						
						if(res.meta.status !== 201) {
							return this.$message.error('添加商品失败！')
						}else {
							this.$message.success('添加商品成功')
							this.$router.push('/goods')
						}
					}
				})
			}
		},
		computed: {
			cateId() {
				if(this.addForm.goods_cat.length === 3) {
					return this.addForm.goods_cat[2]
				}
				return null
			}
		}
	}
</script>

<style scoped>
	.el-breadcrumb {
		margin-bottom: 15px;
	}

	.el-steps {
		margin: 15px 0;
	}

	.el-step__title {
		font-size: 13px;
	}
	.el-checkbox {
		margin: 0 10px 0 0 !important;
	}
	.previewIng {
		width: 100%;
	}
	.ql-editor {
		min-height: 300px;
	}
	.btnAdd {
		margin-top: 15px;
	}
</style>
